1、The guitar chord practice tool is easy to install in one clip. Hold down multiple strings with one click. 2、Nine universal chords, with these chords, you can play more than 90% of popular songs. 3、Adults or children, young or old, anyone can quickly and easily learn to play-guitar. 4、As soon as the guitar learning system is properly attached to your acoustic or electric guitar, you will be making music. Begin playing from the minute you attach. 5、The guitar practrice aid is suitable for most brands of folk guitar between 38 inch to 41 inch. The chord learning tool can help you to learning the chords by the different colors button, easy to remember, no pain for your finger. Features: The guitar chord practice tool is easy to install in one clip. Hold down multiple strings with one click. Nine universal chords, with these chords, you can playing more than 90% of popular songs. Adults or children, young or old, anyone can quickly and easily learn to play-guitar. As soon as the guitar learning system is properly attached to your acoustic or electric guitar, you will be making music. Begin playing from the minute you attach. The guitar practrice aid is suitable for most brands of folk guitar between 38 inch to 41 inch. Specifications: Color: gold, silver, black (optional) Material: plastics+metal Item szie: 140 * 80 * 50mm / 5.5 * 3.1 * 2.0in Item weight: 85g / 3.0ounce Package size: 150 * 90 * 70mm / 5.9 * 3.5 * 2.8in Package weight: 130g / 4.6ounce Packing List: 1 * Chords Teaching Aid 1 * Chords Teaching Aid